tree 73562003c07682bb6aec72ce193f8f3bdb2efac1
parent 315ea1eca62a8c9c845f4bd78f8554cda3468fab
author Christoph Hellwig <hch@lst.de> 1533934822 -0700
committer Darrick J. Wong <darrick.wong@oracle.com> 1537305016 -0700

xfs: use WRITE_ONCE to update if_seq

Source kernel commit: 2ba090d521c5e09f32316c179d25bb6f699d3568

This adds ordering of the updates and makes sure we always see the if_seq
update before the extent tree is modified.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>